LAKE YELLOWSTONE, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(485345) LAKE YELLOWSTONE
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	0	0	0	4	59	225	464	436	195	34	0	0	1416
40 S	0	0	0	4	63	288	752	1188	1383	1416	1416	1416	1416
45 M	0	0	0	0	15	115	311	286	91	4	0	0	823
45 S	0	0	0	0	15	130	441	727	819	823	823	823	823
50 M	0	0	0	0	2	41	168	148	29	0	0	0	388
50 S	0	0	0	0	2	44	211	359	388	388	388	388	388
55 M	0	0	0	0	0	9	59	47	4	0	0	0	119
55 S	0	0	0	0	0	9	68	114	119	119	119	119	119
60 M	0	0	0	0	0	1	10	8	0	0	0	0	20
60 S	0	0	0	0	0	1	11	20	20	20	20	20	20

Corn Growing Degree Days
50 M	0	0	1	12	75	178	335	325	184	62	2	0	1173
50 S	0	0	1	13	88	266	601	925	1109	1171	1173	1173	1173

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Jul 28, 2006
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu